Michael Gribbin has conducted and played keyboards across North America with national tours of such shows as Wicked, The Lion King, Monty Python's Spamalot, and Les Miserables. Regionally, he has worked at the 5th Avenue Theatre in Seattle, The Geva Theatre in Rochester, the Asolo Theatre in Sarasota, and the Milwaukee Repertory Theatre.

As a coach and accompanist, Michael has worked with students at The Pacific Conservatory for the Performing Arts, Loretto Heights College, The University of Michigan, and the University of Illinois, where he received his Master's Degree under the tutelage of renowned accompanist John Wustman.